[linux-audio-dev] oss2jack 0.13: A kernel-based approach to using OSS applications with jackd

Hi, I have been quite frustrated with the difficulty of getting multiple OSS applications using my sound hardware simultaneously. The LD_PRELOAD hacks that I have tried leave much to be desired in terms of usability, especially when dealing with arts and mozilla plugins. oss2jack uses Jeremy Elson's useful fusd library (http://www.circlemud.org/~jelson/software/fusd/) to create a userspace character device, which is also a jackd client. It supports mono and stereo streams, with virtually any sample rate thanks to libsamplerate (http://www.mega-nerd.com/SRC/). Only the commonly-used OSS ioctls are currently supported. I have tested oss2jack with the following applications, and they behave fairly well: - mplayer - artsd (and thus all the kde applications) - xmms - Macromedia Flash TODO: - support mmap for quake and other games (requires support in fusd) - detect jackd period for audio sync (currently assumes 64 samples). Should not be too noticeable unless you get above a 256 sample period) - lower CPU usage with artsd by blocking until the minimum fragment size is available (rather than the jackd period) - support for the OSS mixer. Available at: http://fort.xdas.com/~kor/oss2jack/ WARNING: I have not yet tested oss2jack on the 2.4 series kernel. Currently I am using a self-created 2.6 patch for fusd available at the site above. It has been stable for the past 3 weeks on my machine, but no guarantees about stability or safety... :) fusd currently requires that devfs be enabled in the kernel. Any comments are appreciated. Kor